单项选择题
I（）shorebased radar assistance.
A.ask B.look for C.requir D.in need of
单项选择题 I am m intaining my course and speed. You can（）ahead of me.
单项选择题 I am not（）command.
单项选择题 I am proceeding at a slackened speed. Here slackened stands for（）.
